Global Patent Index - EP 0695978 A1

EP 0695978 A1 19960207 - Electronic control timepiece

Title (en)

Electronic control timepiece

Title (de)

Elektronische Kontrolluhr

Title (fr)

Montre de contrÔle électronique

Publication

EP 0695978 A1 19960207 (EN)

Application

EP 95305448 A 19950803

Priority

  • JP 18261794 A 19940803
  • JP 15654695 A 19950622

Abstract (en)

The present invention relates to a compact and thin electronic control timepiece having a long lasting time for indicating highly accurate time. The flow of an AC electromotive force (102) induced in a coil in a generator (3) powered by a power spring (1) is supplied to a step-up circuit (15) in an IC (11). The step-up circuit (15) boosts the rectified electromotive force (102) doubling to charge in a smoothing capacitor (4) as storage power. A step-up control circuit (16) generates a step-up control signal for controlling the step-up operation of the step-up circuit (15). A cycle comparing circuit (8) compares a reference cycle signal from an oscillation circuit (7) and a detected cycle signal (105) synchronized with the rotational cycle of the generator (3), generates a cycle correction signal (106) for eliminating a time difference between both signals, and outputs the signal to a load control circuit (5). The load control circuit (5) in turn changes a load current (107) on the generator (3) by appropriately selecting a load resistor for changing switching elements within an internal circuit, controls the amount of an electromagnetic brake corresponding to a current amount (107) flowing through the load resistor and thereby governs the speed of the rotation cycle of the generator (3). <MATH>

IPC 1-7

G04C 10/00; G04G 1/00

IPC 8 full level

G04C 3/14 (2006.01); G04B 17/00 (2006.01); G04C 3/00 (2006.01); G04C 10/00 (2006.01); G04G 19/04 (2006.01); G04G 99/00 (2010.01); H02K 7/18 (2006.01); H02M 3/07 (2006.01)

CPC (source: EP US)

G04C 10/00 (2013.01 - EP US); G04G 19/04 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

Citation (third parties)

Third party :

  • CH 597636 A
  • US 4141064 A 19790220 - NAGASHIMA SHINICHI
  • GB 2158274 A 19851106 - SUWA SEIKOSHA KK
  • EP 0241219 A2 19871014 - SEIKO INSTR INC [JP]
  • EP 0326312 A2 19890802 - SEIKO EPSON CORP [JP]
  • EP 0326313 A2 19890802 - SEIKO EPSON CORP [JP]
  • EP 0467667 A2 19920122 - SEIKO EPSON CORP [JP]
  • EP 0239820 B1 19891018
  • KLAUS SCHLENZIG: "ELEKTRONIK FUER ELEKTROMECHANIKER", vol. 8, 1982, VEB VERLAG TECHNIK, BERLIN, pages: 272 - 275
  • DR.WOLFRAM BITTERLICH: "EINFUEHRUNG IN DIE ELEKTRONIK", 1967, SPRINGER VERLAG, WIEN/NEW YORK, pages: 552 - 556
  • ALBRECHT ROST: "GRUNDLAGEN DER ELEKTRONIK (Berichtigter Nachdruck der 1. Auflage)", 1986, AKADEMIE-VERLAG, BERLIN, pages: 161 - 163
  • RAINER FUNKE, SIEGFRIED LIEBSCHER: "LEHRBUCH FUER DIE BERUFSBILDUNG: 'GRUNDSCHALTUNGEN DER ELEKTRONIK'", 1983, VEB VERLAG TECHNIK, BERLIN, pages: 9 - 14
  • HELMUT LINDNER ET AL.: "ELKTROTECHNIK - ELEKTRONIK", vol. 2, 1983, VEB FACHBUCHVERLAG, LEIPZIG, pages: 290 - 293
  • KARL-HEINZ RUMPF: "BAUELEMENTE DER ELEKTRONIK: 'EIGENSCHAFTEN UND ANWENDUNG'", vol. 12, 1985, VEB VERLAG TECHNIK, BERLIN, pages: 163 - 167
  • MOTOMU HAYAKAWA: "A Study of the New Energy System for Quartz Watches (II) - The Effective Circuit for the System", ACTES DES CONGRES EUROPEEN DE CHRONOMETRIE, no. 1, 23 September 1988 (1988-09-23), GENEVE, pages 81 - 85, XP000035001
  • WALTER CONRAD: "BI-TASCHENLEXIKON ELEKTRONIK - FUNKTECHNIK", 1982, VEB BIBLIOGRAPHISCHES INSTITUT, LEIPZIG, pages: 161 - 163

Designated contracting state (EPC)

CH DE FR GB LI NL

DOCDB simple family (publication)

EP 0695978 A1 19960207; EP 0695978 B1 20011212; DE 69524497 D1 20020124; DE 69524497 T2 20020516; DE 69530623 D1 20030605; DE 69530623 T2 20031016; DE 69530623 T3 20070510; EP 0982638 A1 20000301; EP 0982638 B1 20030502; EP 0982638 B2 20060913; HK 1014773 A1 19990930; HK 1026032 A1 20001201; JP 3174245 B2 20010611; JP H08101284 A 19960416; US 5615178 A 19970325

DOCDB simple family (application)

EP 95305448 A 19950803; DE 69524497 T 19950803; DE 69530623 T 19950803; EP 99203757 A 19950803; HK 00105245 A 20000821; HK 98115943 A 19981228; JP 15654695 A 19950622; US 59198796 A 19960129